hello i have read your query.Bad breath or halitosis is often caused by a buildup of bacteria in your mouth that causes inflammation and gives off noxious odors or gases that smell like sulfur.it can result from poor dental health habits and may be a sign of other health problems.Smoking or chewing tobacco-based products can also cause bad breath.it can be a signs of gum (periodontal) disease. Gum disease is caused by the buildup of plaque on teeth. The bacteria cause toxins to form in the mouth.yeast infections of the mouth can also cause bad breath.medical condition like dry mouth (also called xerostomia) can also cause bad breath. i suggest you to visit a dentist and get it cheked out. hope this ans helps Regards Dr. shesh